Greenland halibut (Reinhardtius hippoglossoides) off Southern Labrador and Northeastern Newfoundland (Northwest Atlantic) feed primarily on capelin (Mallotus villosus)

Bowering, W. R.; Lilly, George R.

doi:10.1016/0077-7579(92)90021-6

Cited by 66 publications

(48 citation statements)

References 9 publications

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“…This is in good agreement with observed stomach contents and the few observations of larger Greenland halibut in the water column. Smidt (1969), and Bowering and Lilly (1992) found a similar content of pelagic Crustacea in the stomachs of small Greenland halibut, <19 cm, at several localities at West Greenland and off Canada. They also reported that medium sized Greenland halibut (30-60 cm) feed mainly on capelin, which were neither observed in the stomachs nor in the trawl catches in this study.…”

Section: Discussion Pelagic Occurrence In Shallow Watermentioning

confidence: 99%

“…Bowering and Lilly (1992) have reported that the stomach contents of small and medium sized Greenland halibut taken on the bottom were dominated by pelagic crustacea and capelin (Mallotus villosus), respectively. Furthermore, Bowering and Parsons (1986) and Chumakov (1970) have described changes in catch rates between day and night in a bottom trawl research fishery, which may also indicate vertical migration.…”

Section: Introductionmentioning

confidence: 99%

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Pelagic Occurrence of Greenland Halibut,Reinhardtius hippoglossoides(Walbaum), in West Greenland Waters

Jørgensen¹

1997

J. Northw. Atl. Fish. Sci.

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The extent of pelagic occurrence of Greenland halibut, Reinhardtius hippoglossoides (Walbaum), in Greenland waters was evaluated from four pelagic surveys, two conducted at deep water areas where the commercial fishery takes place and two in areas considered to be important nursery areas. The results from the pelagic surveys are compared to results from bottom trawl surveys conducted in the same areas and at the same time. Pelagic behaviour was further supported by investigations of stomach contents from Greenland halibut sampled during pelagic and bottom surveys, and by analysis of commercial bottom trawl data. One-year-old Greenland halibut were abundant and they undertook vertical feeding migrations at night. Older Greenland halibut were rarely encountered pelagically, and the analysis of commercial trawl data showed that the catchability of Greenland halibut did not vary diurnally.

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Section: Discussion Pelagic Occurrence In Shallow Watermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pelagic Occurrence of Greenland Halibut,Reinhardtius hippoglossoides(Walbaum), in West Greenland Waters

Jørgensen¹

1997

J. Northw. Atl. Fish. Sci.

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“…Additionally, in order to compare the feeding intensity between species and hauls, a partial (PFI) and total fullness index (TFI) were used together with a fullness index (%BW). PFI and TFI were proposed for use in such research by Bowering and Lilly (1992) and, in the present study, were calculated as a mean per haul from the formulae and where F, R and E are respectively the number of full, regurgitated and empty stomachs of the studied predator species in haul h, V ij is the volume of prey i in stomach j, k the number of stomachs in the haul h, L j the length of predator j, H the total number of hauls in which stomachs of the predator species were analysed, and X is the total number of different prey categories consumed by the predator throughout the study. The %BW is the wet weight of stomach contents expressed as a percentage of the fish body weight; it was also calculated as a mean for each species by haul using the regurgitated correction factor.…”

Section: Methodsmentioning

confidence: 99%

The feeding behaviour of some demersal fish species in response to artificial discarding

Olaso¹,

Sánchez²,

Rodríguez-Cabello³

et al. 2002

Sci. Mar.

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SUMMARY:In an attempt to detect changes in the diet and the feeding intensity of demersal fish caused by fishery discarding, two hauls were carried out 22 h apart at a depth of 90 m in an area of the Cantabrian Sea closed to trawling. Before the second haul, dead fauna that were not common in the sampling area under natural conditions, such as Micromesistius poutassou and squat lobster (Munida spp.), which are both usually discarded by the fleet and mainly found in deeper water, were thrown overboard. A total of 319 stomach contents from 12 demersal fish species caught in both hauls were analysed. The percentage emptiness decreased in the second haul (32%) with respect to the first (43%), and at the same time the feeding intensity of scavenger species such as Trachinus draco, Pagellus acarne, Scyliorhinus canicula, Raja montagui and Leucoraja naevus increased. Discards of M. poutassou was actually found in the stomach of a typically planktophagous species, Pagellus bogaraveo. Observed changes in trophic structure of the species analysed as a response to discards are discussed.Key words: Cantabrian Sea, diet, feeding behaviour, fisheries discards, scavengers. RESUMEN: CONDUCTA ALIMENTICIA DE ALGUNOS PECES DEMERSALES ANTE EL DESCARTE ARTIFICIAL. -Con el objetivo de detectar los cambios que producen los descartes de las pesquerías en la intensidad de alimentación y la dieta de los peces demersales se realizaron, en un intervalo de tiempo de 22 horas, dos lances de arrastre de fondo semejantes a una profundidad de 90 metros y en un área cerrada a la pesca comercial de arrastre del Mar Cantábrico. Antes del segundo lance, se arrojó al mar fauna muerta que se encuentra en condiciones naturales en aguas más profundas, como Micromesistius poutassou y Munida spp, especies que suelen ser descartadas por la flota. Se analizaron 319 contenidos estomacales de 12 especies de peces demersales capturados en ambos lances. El porcentaje de estómagos vacíos decreció en el segundo lance (32%) con respecto al primero (43%), y al mismo tiempo aumentó la intensidad de alimentación de las especies carroñeras como Trachinus draco, Pagellus acarne, Scyliorhinus canicula, Raja montagui y Leucoraja naevus. La especie descartada M. poutassou se encontró en estómagos de la especie típicamente planctófaga Pagellus bogaraveo. Asimismo se discuten los cambios producidos en la estructura trófica de las especies analizadas como respuesta al alimento suplementario que constituye el descarte.

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“…The relative importance of individual prey taxa was assessed with indices of frequency of occurrence, number and weight (Clark 1985) and a stomach fullness index (Bowering & Lilly 1992):…”

Section: Methodsmentioning

confidence: 99%

Shrimp trawl catches and stomach contents of redfish, Greenland halibut and starry ray from West Greenland during a 24-hour cycle

Pedersen¹

1994

Polar Research

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Greenland halibut (Reinhardtius hippoglossoides) off Southern Labrador and Northeastern Newfoundland (Northwest Atlantic) feed primarily on capelin (Mallotus villosus)

Cited by 66 publications

References 9 publications

Pelagic Occurrence of Greenland Halibut,Reinhardtius hippoglossoides(Walbaum), in West Greenland Waters

Pelagic Occurrence of Greenland Halibut,Reinhardtius hippoglossoides(Walbaum), in West Greenland Waters

The feeding behaviour of some demersal fish species in response to artificial discarding

Shrimp trawl catches and stomach contents of redfish, Greenland halibut and starry ray from West Greenland during a 24-hour cycle

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